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Why Generator KVA not in KW ?
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Answer Posted / shelleymuston
All electrical devices that supply power are usually rated in kVA. This includes transformers, UPS's & the like.
Simply put, the difference between kVA & kW is that kVA is "Apparent Power", which does not take into account the Power Factor & kW is "True Power" . See the below equations:
VA = E x I
W = E x I x Cos phi
The above equations are only for single phase.
When a manufacturer makes a transformer, generator, UPS etc, they have no idea of the type of load that will be used & consequently can only rate the device according to its maximum current output that the conductors can safely carry (at untiy Power Factor) & the insulation rating of the conductors (voltage & temperature).
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